Flora of North America species comparison

intricately branched, hirtellous, sparsely gland-dotted.

branched, pubescent.

alternate;

petioles 1–2 mm;

blades (venation obscure) oblong to spatulate, 3–12 × 1–4 mm, bases acute to acuminate, margins entire, apices acute to obtuse, faces tomentose, gland-dotted.

opposite;

petioles 0–1 mm;

blades 3-nerved from bases, deltate-ovate to lanceolate, 7–30 × 4–28 mm, bases mostly obtuse to subtruncate, sometimes acuminate, margins serrate, apices acute, faces puberulent, gland-dotted.

10–30 mm, villous, gland-dotted.

10–30 mm, puberulent.

cylindric, 9–11 mm.

cylindric to campanulate, 8–12 mm.

20–30;

corollas purplish, 6.5–7.5 mm.

8–14;

corollas pale green or yellow, 5.5–6.5 mm.

20–25 in 5–6 series, greenish, often purple-tinged, 4–5-striate, unequal, (sparsely villous, gland-dotted) margins narrowly scarious (apices rounded, mucronate);

outer ovate to lanceolate (ciliate), inner linear-oblong.

12–15 in 3–5 series, greenish, often purple-tinged, 5–7-striate, unequal, margins scarious (apices acute);

outer ovate to lance-ovate (puberulent, margins ciliate), inner narrowly lanceolate (glabrous).

in paniculiform arrays.

borne singly or in corymbiform-paniculiform arrays.

3.5–4.8 mm, hispidulous;

pappi of 26–30 white, barbellulate bristles.

4.5–5 mm, densely pubescent;

pappi of 24–30 white, usually barbellate, sometimes subplumose, bristles.

= 18.